1) The ………………… is a fixed point of the lever. a) effort force b) fulcrum c) resistance force 2) The... is a rigid bar that rotates around a fixed point. a) lever b) fulcrum c) effort force 3) …………… is a simple machine that makes tasks easier invented in the past.   a) Lever b) Fulcrum c) Effort force  4) The manual broom is a ………………… class lever. a) 1st b) 2nd c) 3rd 5) Nutcracker is a........... class lever. a) 1st b) 2nd c) 3rd

Tauler de classificació

Estil visual

Opcions

Canvia de fonament

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